Facilitating interoperability among heterogeneous geographic database systems: A theoretical framework, a prototype system, and evaluation

Persistent Link:
http://hdl.handle.net/10150/284627
Title:
Facilitating interoperability among heterogeneous geographic database systems: A theoretical framework, a prototype system, and evaluation
Author:
Park, Jinsoo
Issue Date:
1999
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The objective of this research is to develop a formal semantic model, theoretical framework and methodology to facilitate interoperability among distributed and heterogeneous geographic database systems (GDSs). The primary research question is how to identify and resolve various data- and schematic-level conflicts among such information sources. Set theory is used to formalize the semantic model, which supports explicit modeling of the complex nature of geographic data objects. The semantic model is used as a canonical model for conceptual schema design and integration. The intension (including structure, integrity rules and meta-properties) of the database schema is captured in the semantic model. A comprehensive framework classifying various semantic conflicts is proposed. This framework is then used as a basis for automating the detection and resolution of semantic conflicts among heterogeneous databases. A methodology for conflict detection and resolution is proposed to develop interoperable system environment. The methodology is based on the concept of a "mediator." Several types of semantic mediators are defined and developed to achieve interoperability. An ontology is developed to capture various semantic conflicts. The metadata and ontology are stored in a common repository and manipulated by description logic-based operators. A query processing technique is developed to provide uniform and integrated access to the multiple heterogeneous databases. Logic is employed to formalize our methodology, which provides a unified view of the underlying representational and reasoning formalism for the semantic mediation process. A usable prototype system is implemented to provide proof of the concept underlying this work. The system has been integrated with the Internet and can be accessed through any Java-enabled web browser. Finally, the usefulness of our methodology and the system is evaluated using three different cases that represent different application domains. Various heterogeneous geospatial datasets and non-geographic datasets are used during the evaluation phase. The results of the evaluation suggest that correct identification and construction of both schema and ontology-schema mapping knowledge play very important roles in achieving interoperability at the both data and schema levels. The research adopts a multi-methodological approach that incorporates set theory, logic, prototyping, and case study.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Business Administration, Management.; Computer Science.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Business Adminstration
Degree Grantor:
University of Arizona
Advisor:
Ram, Sudha

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleFacilitating interoperability among heterogeneous geographic database systems: A theoretical framework, a prototype system, and evaluationen_US
dc.creatorPark, Jinsooen_US
dc.contributor.authorPark, Jinsooen_US
dc.date.issued1999en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe objective of this research is to develop a formal semantic model, theoretical framework and methodology to facilitate interoperability among distributed and heterogeneous geographic database systems (GDSs). The primary research question is how to identify and resolve various data- and schematic-level conflicts among such information sources. Set theory is used to formalize the semantic model, which supports explicit modeling of the complex nature of geographic data objects. The semantic model is used as a canonical model for conceptual schema design and integration. The intension (including structure, integrity rules and meta-properties) of the database schema is captured in the semantic model. A comprehensive framework classifying various semantic conflicts is proposed. This framework is then used as a basis for automating the detection and resolution of semantic conflicts among heterogeneous databases. A methodology for conflict detection and resolution is proposed to develop interoperable system environment. The methodology is based on the concept of a "mediator." Several types of semantic mediators are defined and developed to achieve interoperability. An ontology is developed to capture various semantic conflicts. The metadata and ontology are stored in a common repository and manipulated by description logic-based operators. A query processing technique is developed to provide uniform and integrated access to the multiple heterogeneous databases. Logic is employed to formalize our methodology, which provides a unified view of the underlying representational and reasoning formalism for the semantic mediation process. A usable prototype system is implemented to provide proof of the concept underlying this work. The system has been integrated with the Internet and can be accessed through any Java-enabled web browser. Finally, the usefulness of our methodology and the system is evaluated using three different cases that represent different application domains. Various heterogeneous geospatial datasets and non-geographic datasets are used during the evaluation phase. The results of the evaluation suggest that correct identification and construction of both schema and ontology-schema mapping knowledge play very important roles in achieving interoperability at the both data and schema levels. The research adopts a multi-methodological approach that incorporates set theory, logic, prototyping, and case study.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectBusiness Administration, Management.en_US
dc.subjectComputer Science.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineBusiness Adminstrationen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRam, Sudhaen_US
dc.identifier.proquest9934867en_US
dc.identifier.bibrecord.b39685044en_US
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